Interesting to look at this table from ONS. You have to download the XLSX document then click on table one.
What is interesting is that it gives the causes of death in March. There is no mention of ennui as cause of death. No murders, apparently and no suicides. But lots of deaths due to other conditions including Covid-19.
Another interesting table is Table 5a which gives covid=19 deaths according to ages and underlying comorbidities. Overall there are 6-10% of deaths in people without underlying disease in the age groups above 70. Also in the 40-45 age group this proportion is 34% (although the numbers are small).